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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Monopole-Fermion Scattering and the Solution to the Semiton-Unitarity Puzzle
Vazha Loladze1, Takemichi Okui2,3
1University of Oxford, Rudolf Peierls Centre for Theoretical Physics, Parks Road, Oxford OX1 3PU, United Kingdom.
Abstract:
We study Polchinski's "fermion-rotor system" as an accurate description of charged Weyl fermions scattering on a magnetic monopole core in the limit of zero gauge coupling. Traditionally it was thought such scattering could lead to fractional particle numbers ("semitons"). By direct calculations we show those semitonic processes are in fact free propagation, facilitated by composite fermion-rotor operators interpolating the "forbidden" states, effectively "recovering" both ingoing and outgoing states in every lowest partial wave. Nonsemitonic Callan-Rubakov processes are unchanged.
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